What is salvarsan To which class of drugs does it belong and for what disease is it used ?

Explanation

### Step-by-Step Solution:

1. **Definition of Salvarsan**:
- Salvarsan is an organoarsenic compound that was historically used as a treatment for syphilis. It was one of the first modern chemotherapeutic agents.

2. **Class of Drugs**:
- Salvarsan belongs to the class of drugs known as "antimicrobials" or more specifically, "antibacterial agents." It is particularly classified as a "synthetic antibiotic."

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